Ascorbic acid (AA) has antioxidant properties. However, in the presence of Fe2+/Fe3+ ions and H2O2, it may behave as a pro-oxidant by accelerating enhancing formation hydroxyl radicals (•OH). Therefore, this study we evaluated effect AA at concentrations 1 to 200 µmol/L on •OH-induced light emission (at pH 7.4 temperature 37 °C) from 92.6 Fe2+—185.2 EGTA (ethylene glycol-bis (β-aminoethyl ether...

A study is performed of the effect means activation bentonite-like clays (acidic, alkaline, combined) have on adsorption characteristics Fe3+ ions under static conditions. The mechanism acidic and alkaline montmorillonite identified found to depend concentration activating agent. Solutions sulfuric acid lithium hydroxide are used as agents. It shown that during combined treatment enriched clay ...

The electronic structures of the luminescent center ions Cr3+ and Fe3+ in deep red phosphors LiAl5O8:Cr3+, ?-Al2O3:Cr3+, ?-LiAlO2:Fe3+ were calculated by DV-X? method, which local distortion induced replacement Al3+ sites host crystals was reproduced classical molecular dynamics (MD) simulation. MD simulations based on allowed for handling more than 1000 atoms lattice relaxation calculations, a...

Redox activity was measured in vegetative and generative apical parts (5 mm of the stem) and youngest leaves of winter (cv. "G6rczański") and spring (cv. "Młochowski") rape. Both genotypes were cultured under the same growth conditions (17/15 degrees C day/night, 16 h photo-period), but winter rape was additionally vernalized (5/2 degrees C day/night, 56 days) in order to induce the generative ...

Ti-doped barium ferrite powders BaFe12-x Ti x O19 (x = 0, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8) were synthesized by the sol-gel method. The phase structure and morphology were analyzed by x-ray diffraction (XRD) and scanning electron microscopy, respectively. The powders were also studied for their magnetic properties and microwave absorption. Results show that the Ti-doped barium ferrites (BFT...

Stable magnetic nanofluids containing Fe3O4@Polypyrrole (PPy) nanoparticles (NPs) were prepared by using a facile and novel method, in which one-pot route was used. FeCl3·6H2O was applied as the iron source, and the oxidizing agent to produce PPy. Trisodium citrate (Na3cit) was used as the reducing reagent to form Fe3O4 NPs. The as-prepared nanofluid can keep long-term stability. The Fe3O4@PPy ...

Iron-doped bismuth sulphide (Bi2-xFexS₃) nanocrystals have been successfully synthesized in a glass matrix using the fusion method. Transmission electron microscopy images and energy dispersive spectroscopy data clearly show that nanocrystals are formed with an average diameter of 7-9 nm, depending on the thermic treatment time, and contain Fe in their chemical composition. Magnetic force micro...

In this study, we prepared novel fluorescent carbon quantum dots/hydrogel nanocomposite material (CQDsHG) with good adsorption and stable fluorescence detection of Fe3+. The materials were subsequently characterized according to their morphological features, chemical composition, adsorption, optical properties. dots (CQDs) using a microwave-assisted hydrothermal method in no more than 15 min, t...